[Revert^2] Reject TetheringRequests that fuzzy-match existing ones am: 8b29d287f5

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/3543706

Change-Id: I6ac631f6cb393f406eb7c89036062480e29e40c1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>